Timing mechanism for glass feeders



Feb. 11,1936. o, M TUCKER ET AL 2,030,804

TIMING MECHANISM FOR GLASS FEEDERS original Filed Oct. 24, 1915 'y' iorngy.

Patented Feb. 1'1, 1936 UNITED STATES PATENT OFFICE TIMING MECHANISM FOR GLASS FEEDERS Ware Original application October 24, 1913, Serial No.

Divided and this application November 17, 1926, Serial No. 148,985

7 Claims.

This application is a division of our copending application for Letters Patent filed October 24, 1913, Serial No. 797,067, and is led for the purpose of claiming a novel timing device disclosed in the said application.

Our invention relates particularly to the timing of the operations of glass feeding apparatus that is operated by fluid pressure, and its general object is to provide a timing mechanism for controlling the admission and the exhaust of motive fluid in such a way that the time of admission and the time of exhaust may be adjusted independently of each other and with accuracy. In the specic embodiment of our invention that is shown herein, We provide a uid-inlet valve, an exhaust valve, and a cam for actuating each valve, the cams being carried by rotary disks and being adjustable around their axis of rotation so as to change the time of operation of either valve independently. To secure a 4finer adjustment of the time-interval between the actuation of the valves, we provide an intermediate actuating member interposed between one of the cams and its associated valve, this intermediate member being adjustable so as to change the time when the valve is actuated in response to the rotation of its cam.

In the accompanying drawing, which is a reproduction of a part of the drawings of our earlier application Serial No. 797,067 identified above,

Figure 1 is an end elevational View, with parts in section, of a timing device constructed in accordance with our invention;

Fig. 2 is a side elevation, on a reduced scale, of the structure shown 'in Fig. 1;

Fig. 3 shows an edge view of the pair of timing disks of the actuating device, part of the disks being broken away for convenience of illustration. In connection with the disks, motive fluid valves are shown in operative relation.

Fig. 4 is a vertical sectional View of a device for adjusting the position of the intermediate actuating arm of the device.

Motive fluid, for operating the glass feeder with which our timer is to be associated, may be brought to the apparatus constantly through a pipe 32 and may be allowed to flow intermittently through a pipe 33 leading to an operating part of the glass feeder, such as the shear mechanism or mechanism for controlling the discharge of the glass. The pipes 32 and 33, as shown, are connected to a valve casing 31 at ports 3B and 39, re-

spectively, and this casing is also provided with an exhaust port open to the atmosphere.

Within the valve casing 31 are a pair of valves 4| and 42 adapted to seat upon their respective 5 seats 43 and 44, and these seats are connected by a passage 45, into which passage the port 39 also enters. Each valve has a stem, as 46 and 41, movable in the body of the casing 31 which is perforated for the purpose, and the screw plugs 48 and 49 close the valve chambers and permit access to the interior of the casing.

The valves are both held to their seats by motive fluid pressure, but are lifted therefrom by mechanical means, as follows: Upon a continuously 15 revolving shaft 50, a pair of disks 5I and 52, which are connected by the integral sleeve 53, are carried and revolve at constant speed with the shaft. The inner adjacent faces of these disks are each dished so that their peripheries are formed with 20 beveled edges 54 and 55 respectively, the beveled portions extending entirely around the disks.

l The disks are provided for the purpose of carrying avpair of actuating cams or wedge-shaped blocks as 56 on disk 5| and 51 on disk 52. Each 25 of the blocks is formed with an undercut flange 58 adapted to engage the beveled edge of the disk and each block is clamped to the edge of the disk by means of a clamp plate 59 and bolt 60 as clearly seen in Figs. 1 and 3. 'I'he cam blocks are adapted 30 to actuate the stems of the valves, and the inter- Val between the periodical lifting of the valves from their seats by the cam blocks may be varied by adjusting the blocks around the perimeter of the disks.

In addition to adjusting the position of the cam blocks, on the disks, we provide for a closer and more minute adjustment, which may be accomplished with the machine in operation. The device for accomplishing this auxiliary adjustment 40 includes a pivotally supported lever arm 6| supported at 62 in the slotted and perforated end of an internally threaded bar 63, which is encased by a cylindrical sleeve 64. This sleeve is fashioned `with a bracket arm 65, by means of which it is .attached to the valve casing 31, and a screw bar 66, having a knurled head 61,.is rotatable in the sleeve. In Fig. 4 it will be seen that the threaded bar and screw coact, whereby the bar is projected from or made to recede within the sleeve 64. The

-arm 6| is fashioned with a downwardly projecting lug 68, which rests on the periphery of the disk as it revolves, and rides over the cam block or wedge 56 as the blockpasses thereunder. The upper edge of the arm 6|, near its end, is formed with a curved face 69 upon which'the lower end of the stem 46 rests, and it will thus be seen that the stem 46 with its valve 4| is lifted throughcontact of the cam block 56, lug 63, curved face 69 and stem 46.

From this description it will be seen that by projecting the bar 63 from the sleeve 64, and assuming that the disks are revolving as shown by the arrow in Fig. 1, the interval of time between the lifting of the inlet valve 42 and the.

lifting of the exhaust valve 4| is lengthened. This lengthens the time the compressed air is allowed to flow through the pipe 33 to the feeding apparatus. The time between the lifting of thel exhaust valve 4| and the lifting of the inlet valve 42 is correspondingly shortened.

By receding the bar within the sleeve the interval of time between the lifting of the inlet valve 42 and the lifting of the exhaust valve 4| is shortened. The time between the lifting of the exhaust valve 4| and the lifting of the inlet valve 42 is correspondingly lengthened. The pipe 32 may have a connection, as 32a, Fig. 2, for transmitting pressure constantly to any desired part of the apparatus with which the control device is associated.

The time-interval between the lifting of the inlet valve 42 and the lifting of the exhaust valve 4| thus depends upon the relative positions of the cam members 56 and 51. These cam members are adjusted peripherally around their respective disks to the approximate positions necessary to produce the desired time interval, and a finer adjustment may then be had by turning the screw head 61 to advance or retract the arm 6|,

When this apparatus is in use, the valve 42 is held to its seat by air pressure and the valve' 4|is held off its seat by the cam 56, when the parts are in the position shown in the drawing,

so that air has exhausted from the pipe 33 and to the atmosphere through the port lll).` 'I'he disks are now revolved` with the shaft 50, so that the disengagement of the cam 56 permits the valve 4| to drop to closed position, and a -continued revolution of the disks brings the cam 5'| in position to lift the valve 42 from its seat and open the valve, so that the constant pressure of air from the pipe 32 may enter and pass under the valve, holding closed the valve 4| and then passing through the pipe 33 to the feeding apparatus. Continued movement of the cam disks brings the parts again to the position shown in the drawing.

While the details of construction shown and described herein are well suited to carry out our invention, it will be understood that various changes in the form and arrangement of parts may be made without departing from our invention as set forth in the appended claims.

-We claim as our invention:

l. Timing mechanism for glass feeding apparatus or the like, comprising a rotary cam disk, a cam element carried by said disk and adjustable circumferentially thereon, a valve-actuating member pivotally mounted at one of its: ends and adapted to be rocked upon its pivotal axis by said cam element, and means for adjusting the pivot of said valve-actuating member to which said cam element engages and moves said valve-actuating member.

2. Timing mechanism for glass feeding apparatus or the like, comprising a rotary cam disk, a cam element carried thereby, a valve, an intermediate pivoted member for transmitting movement from said cam element to said valve, an adjustable support for the pivot of said intermediate member, and a screw for adjusting said pivot back and forth so as to change the place at which said cam element engages said actuating member.

3. Timing mechanism for glass feeding apparatus or the like, comprising a rotary cam disk, a cam element carried by said disk and adjustable circumferentially thereon, a valve having a valve stem, an intermediate valve-actuating member for transmitting movement from said cam to said valveI stem, a pivotal support for one end of said actuating member, a bracket, and a screw extending through said bracket and arranged to adjust the position of the pivot of said intermediate actuating member.

4. Iiming mechanism for glass working apparatus or the like, comprising a fluid inlet valve, a fluid exhaust valve, a single fluid passage communicating with both valves, and a rotary cam for actuating each valve, the said cams being relatively adjustable to vary the time interval between the actuation of said inlet valve and the actuation of said exhaust valve.

5. Timing mechanism for glass working apparatus or the like, comprising a fluid inlet valve, a fluid exhaust valve,. a single fluid passage communicating with both valves, a shaft, a cam mounted to rotate with said shaft and arranged to open said inlet valve, and another cam, also mounted to rotate on said shaft, and arranged to open said exhaust valve, the said cams being relatively adjustable about the axis of said shaft to vary the time interval between the opening of said inlet valve and the opening of said exhaust valve.

6. Timing mechanism for glass working apparatus or the like, -comprising a fluid inlet valve, a fluid exhaust valve, 'a single uid passage communicating with both valves, and arrota'ry cam for actuating each valve, both of said cams being independently adjustable around the axis of said shaft to adjust independently the time of actuation of said inlet valve and the time of actuation of said exhaust valve.

7. Timing mechanism for glass feeders or the like, comprising al shaft, a pair of cam disks carried by said shaft, a cam member carried by each of said disks, and adjustable circumferentially thereon, a pair of movable valve members arranged to be actuated by said cam members at relative times determined by the positions of said cam members on said disks, and means for finely adjusting the relative time of operation of said valves comprising a member interposed between one of said cam members and its associated valve member, and screw means for changing the position of said interposed member so as to change the place at which the associated cam element engages said interposed member.

OLIVER M. TUCKER. WILLIAM A. REEVES. 

